50 G. M. DAWSON — GLACIAL DEPOSITS OF SOUTHWESTERN ALBERTA. 



about 3,500 feet and the distance from the mountains 19 or 20 miles. In 

 descending order, the bluffs here show — 



Feet 



1. Well stratified and current-bedded silts 5 



2. Pale yellowish gray boulder-clay 15 



3. Dark gray boulder-clay 20 



4. Laramie sandstones and shales 15 



55 



Both parts of the boulder-clay hold many and some large stones, often 

 well glaciated and apparently all of western origin. The line between 

 the two layers of boulder-clay is horizontal and quite distinct. Many of 

 the larger stones occur about this level, and one of them was seen to lie 

 about half in the lower and half in the upper division. It is not certainly 

 known that the division between two classes of boulder-clay found in 

 this and the preceding section corresponds with the horizon of the inter- 

 glacial deposits previously described, but it is believed that numbers 1 and 

 2 correspond with numbers 2 and 3 of the Calgary section (see page 53). 



A very few Laurentian fragments were seen in traveling from this place 

 eastward to the town of High River, at the railway crossing (3,371 feet). 

 They appeared to be more abundant to the east. 



HiGHWooD River to Calgary. 



From the town of High River the regular road was followed north- 

 ward to Calgary, 33 miles, crossing Sheep, Pine and Fish creeks and 

 rising over eastward projections of the lower plateau, which here repre- 

 sents the Porcupine hills. Tlie highest point reached between High- 

 wood river and Sheep creek is about 3,623 feet. Here less than one- 

 hundredth of the drift stones are Laurentian, the rest being from the 

 mountains. At 3,495 feet, on the northern descent toward Sheep creek, 

 perhaps one-fiftieth of the stones are Laurentian, but at a corresponding 

 elevation on the southern slope toward the Highwood such stones are 

 exceedingly scarce. At the crossing of Sheep creek (about 3,400 feet) a 

 partially stratified stony deposit, resembling boulder-clay but showing 

 no striated stones, contains a considerable proportion of Laurentian frag- 

 ments. 



Between Sheep and Pine creeks, beginning to the south at about 3,600 

 feet, rising to 3,790 feet and falling again toward Pine creek to 3,500 feet, 

 is a lumpy, undulating countr}^, comprising some hollows and SAvampy 

 depressions without outlet, and repeating somewhat the characters of 

 the Missouri Coteau on a much reduced scale. The surface is pretty 

 thickly covered with soil, which is seen in places to be underlain by de- 



